Shaft-bearing.



F. s. NORTH.

SHAFT BEARING. APPLICATION FILED DEC.26. I9II.

Patented' Jn. 30, 1917. "fll/l////////////////////,

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WJTNESSES 2Q y INI/E T0 Allomey renneiresns refr' FRANCIS S. NORTH, OF CHICAS- ILLINDIS, ASSIGNOR T0 'UNIONl SPECIAL MACHINE COMPANY, 0F CHICAGO, ILLINQIS, A CORPORATION ILLINOIS.

.SHAFT-BEARING.

imanes.

Specification of Letters Patent. Patented am.' 30, 319i?.

Application tiled December 26, 1911. Serial No. 667,649.

.Nvhieh vthe following is a description, reference beine"lial'ti'i"'theaccompanying drawing,r and to the letters and figures of reference marked thereon.

My invention relates` to improvements in shaft hearings, Y it being designed particularly as a hearing for the main shaft oi' sewing machines, the objectbeing to provide a henri ig for such shaft in which friction shall be reduced to a minimum, and in which the bearings can be readily removed and replaced by others in jcase of wear.

The invention therefore, consists 'priinaiily in a bearing for shafts comprising the. framework through which the shaft eX- tends, said framework being adapted for the receptionof the ball retainers, one of said ball retainers securely fitting the recess provided for it. and the other recess being provided with a clearance for its retainer, with a. sleeve surrounding the shaft extending between the inner retainers, and with meansl'or holding saidyretainers in position.

The invention also consists in connection with the above, of a special constructionof sewing machine frame adapted to receive .and thoroughly clain'p the adjustable retainer.

Furthermore, the invention consists in the matters hereinafter described and referred to in the appended'ciaims.

rihe. invention is illustrated in the accompanying drawing, in which,

Figure 1 is a perspective view of a sewing machine head or casting, constructed to receive my Aimproved bearing arrangements for the ina'in shaft; Fig. 2 is n vertical section through the bearings and a portion of the frame, illustrating my shaft bearing.

In these drawings, 1 represents as a Whole, the bed eastingof a sewing machine having the usual upright standard 2, andv overu hanging.:` arm. The upright standard 2 is hoi-ed in the usual manner to receive the main shaft, and at itsl rear end or the part adjacent the belt wheel of the machine, is provided with a shouldered recess 4, to receive the ball retainer 5, which is composed of the outer ring 6 and the inner ring' 7, with the balls inbetween, said retainer 5 being held in position in the recess by means of the felt washer 8 and the screw washer `9,

these bearing against the outer ring. Upon l theothei" side of the standard, above the bore or opening' and extending in for a coni siderable depth, a vertical cut oi'- recess is formed as shown at 10, the outer wall of which is provided l'with a screw opening in which is threaded a screw 11 bearing in the body part of the casting, this screw serving y when driven home,lto spring the metal somewhat and hold the ball retainer 12 rigidly in position. This ball i'etainer12 opposite the hall retainer 5 is con'iposei1 of inner and outer rings 6, 7', and tits in a recess 13 corresponding to the recess 4,' upon the oppo site end of the standard, but said recess 13 is :deeper than the recess 4, in order that aclearance may be left for the outer ring 7',

against 4which bears the telt washer 14, held by a screw washer 15.` A. looking mit 16 is screwedon the threaded collar 1T 'fixed on' the shaftg'and has a'` hub extending through i.

the 'screwjlwasher 15 bearing against the inner ring 6.

Between the two locked inner rin s 7 and G is a sleeve 18 surrounding the siiiha When 'the locking nut is screwed up,'the part .6 of the retainer` 12 bears firmly againstythe slleeve which Ubears against' the' part T of the retainer 5, and holds these parts rigidly together. By reason of having,r the outer ring 7 of the ball retainer 12 formed with a clearance between it and the wali of the recess between which it fits, thatis, as l term it, havin it floating, said retainer may Abe adiuste to any desired position, and wear may be taken up, as 'de siren.

The length of the sleeve 18 is/slightly greater than the distance between the shoulders of the bores -1 and 13, thus permitting a'p'ositive longitudinal clamping of the lparte mounted directlyn the shaft 19. fter vclamping the parts, the screw 11 is driven loosening the cone pointed screw of the belt wheel about one-quarter turn, and screwing up the nut 16. Y v

ion

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l have provided two dust'prbtected oii holes leading down into the sides ei the races, zas/'shown in Fig.` 1, and as shown in Fig. &1, lhave provided a cieaninghole 25 closed by a screw. This isprcvided 'te allow- 'benzinl er other` cleaning material" te be Ahushed through the oil holes to Wash out any 'accumulations lof dust or dirt,` into ,the pocket and by removing the ping .or screw 26', the

u channels which are liable to ll with dirt 'and sediment, may be empletely ushed out.

" Hariri g thusparticularlydescribed my invetiomwhat I claim as new and desire to secure by Letters Patent", is

L The combination of a supporting frame `*having an opening therethrough, said open- ;ing being enlarged at each end thereof to form 'a seating recess for a ball retainer, a l ball retainer inyeach recess, each of said ball V retainers comprising innerand outer rings and balls between the rings, a main shaft ex- ,tending through the inner rings, a collar tired to the shaft 'and engaging the inner ring oi ene of saiddball retainers, a sleeve on theV shaft between the inner rings of the ball retainers, a second collar .secured to the shaft,

` va threaded nut engaging said collar 'and bearing against the inner ring of the ball retainer' forgclamping saidring against said sleeve and said sleevey agalnstathe inner ring vbf the iirst namedball retainer, whereby said y innergrings'vof'theball retainers are secured to the shaft, sald supporting frame having a slot extending inte the enlarged recess at the endfbf the opening edgacent said threaded nut, and means for drayvingthe Walls of said slot together to clamp the outer ring of the i ball retainer in adjusted positions.

2. rilhe combination of a supportingv frame having an opening therethrough, said, opening being enlarged at each end thereof toI form a seating recess for a ball retainer, a ball retainer in each recess, each of said -ball retainers comprising inner and outer rings and balls between the rings, la main shaftextending through the inner rings, a collar fixed to the shaft and engaging the inner vring of one of said ball retainers, a sleeve on the shaft between the inner rings of the ball retainers, a secondv collar secured to the shaft, a threaded nut engaging said collarl screw washers for closing the outer ends of the enlarged recesses at each end of said opening.' y

'In testimon whereof I ax my "signature, in presence o two witne.v

FRANQIS S. NORTH.

Witnesses: l

A.' csaam., 

